Question

the electronic configuration of an element is 1s²2s²2p^6 3s²3p³

Answer 1

Question seems to be incomplete....

1s²2s²2p^6 3s²3p³ is electronic configuration of the element No. 15 (No. obtained by adding 2+2+6+2+3)

The 15th element in the periodic table is 'P'.

So Rest of the answer is ......